package controller;

import java.text.DateFormat;
import java.text.ParsePosition;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;

import entities.ConstantsUtil;

/**
 *
 * <一句话功能简述>
 * <功能详细描述>
 *
 * @author  wKF63324
 * @version  [版本号, 2012-10-30]
 * @see  [相关类/方法]
 * @since  [产品/模块版本]
 */
public class DataUtil
{
    //用来全局控制 上一周，本周，下一周的周数变化
    private int weeks = 0;

    /** 一月最大天数 */
    private int maxDate;

    /** 一年最大天数 */
    private int maxYear;

    /**
     * 主方法
     * <功能详细描述>
     * @param args args
     * @see [类、类#方法、类#成员]
     */
    public static void main(String[] args)
    {
        //注释
        DataUtil tt = new DataUtil();
//        System.out.println("获取当天日期:" + tt.getNowTime("yyyy-MM-dd"));
//        System.out.println("获取本周一日期:" + tt.getMondayOFWeek());
//        System.out.println("获取本周日的日期~:" + tt.getCurrentWeekday());
//        System.out.println("获取上周一日期:" + tt.getPreviousWeekday());
//        System.out.println("获取上周日日期:" + tt.getPreviousWeekSunday());
//        System.out.println("获取下周一日期:" + tt.getNextMonday());
//        System.out.println("获取下周日日期:" + tt.getNextSunday());
//        System.out.println("获得相应周的周六的日期:" + tt.getNowTime("yyyy-MM-dd"));
//        System.out.println("获取本月第一天日期:" + tt.getFirstDayOfMonth());
//        System.out.println("获取本月最后一天日期:" + tt.getDefaultDay());
//        System.out.println("获取上月第一天日期:" + tt.getPreviousMonthFirst());
//        System.out.println("获取上月最后一天的日期:" + tt.getPreviousMonthEnd());
//        System.out.println("获取下月第一天日期:" + tt.getNextMonthFirst());
//        System.out.println("获取下月最后一天日期:" + tt.getNextMonthEnd());
//        System.out.println("获取本年的第一天日期:" + tt.getCurrentYearFirst());
//        System.out.println("获取本年最后一天日期:" + tt.getCurrentYearEnd());
//        System.out.println("获取去年的第一天日期:" + tt.getPreviousYearFirst());
//        System.out.println("获取去年的最后一天日期:" + tt.getPreviousYearEnd());
//        System.out.println("获取明年第一天日期:" + tt.getNextYearFirst());
//        System.out.println("获取明年最后一天日期:" + tt.getNextYearEnd());
//        System.out.println("获取本季度第一天到最后一天:" + tt.getThisSeasonTime(ConstantsUtil.NUMBER_11));
//        System.out.println("获取两个日期之间间隔天数2008-12-1~2008-9.29:" + DataUtil.getTwoDay("2008-12-1", "2008-9-29"));
    }

    /**
     * <得到二个日期间的间隔天数>
     * <功能详细描述>
     * @param sj1 参数1
     * @param sj2 参数2
     * @return day long
     * @see [类、类#方法、类#成员]
     */
    public static String getTwoDay(String sj1, String sj2)
    {
        SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
        long day = 0;
        try
        {
            java.util.Date date = myFormatter.parse(sj1);
            java.util.Date mydate = myFormatter.parse(sj2);
            day =
                (date.getTime() - mydate.getTime())
                    / (ConstantsUtil.NUMBER_24 * ConstantsUtil.NUMBER_60
                        * ConstantsUtil.NUMBER_60 * ConstantsUtil.NUMBER_1000);
        }
        catch (Exception e)
        {
            return "";
        }
        return day + "";
    }

    /**
     * <根据一个日期，返回是星期几的字符串>
     * <功能详细描述>
     * @param sdate 参数
     * @return new SimpleDateFormat
     * @see [类、类#方法、类#成员]
     */
    public static String getWeek(String sdate)
    {
        // 再转换为时间
        Date date = DataUtil.strToDate(sdate);
        Calendar c = Calendar.getInstance();
        c.setTime(date);
        // int hour=c.get(Calendar.DAY_OF_WEEK);
        // hour中存的就是星期几了，其范围 1~7
        // 1=星期日 7=星期六，其他类推
        return new SimpleDateFormat("EEEE").format(c.getTime());
    }

    /**
     * <将短时间格式字符串转换为时间 yyyy-MM-dd>
     * <功能详细描述>
     * @param strDate strDate
     * @return strtodate
     * @see [类、类#方法、类#成员]
     */
    public static Date strToDate(String strDate)
    {
        SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd");
        ParsePosition pos = new ParsePosition(0);
        Date strtodate = formatter.parse(strDate, pos);
        return strtodate;
    }

    /**
     * <两个时间之间的天数>
     * <功能详细描述>
     * @param date1 date1
     * @param date2 date2
     * @return day
     * @throws Exception Exception
     * @see [类、类#方法、类#成员]
     */
    public static long getDays(String date1, String date2) throws Exception
    {
        if (date1 == null || date1.equals(""))
        {
            return 0;
        }
        if (date2 == null || date2.equals(""))
        {
            return 0;
        }
        // 转换为标准时间
        SimpleDateFormat myFormatter = new SimpleDateFormat("yyyy-MM-dd");
        java.util.Date date = null;
        java.util.Date mydate = null;
        date = myFormatter.parse(date1);
        mydate = myFormatter.parse(date2);
        long day =
            (date.getTime() - mydate.getTime())
                / (ConstantsUtil.NUMBER_24 * ConstantsUtil.NUMBER_60
                    * ConstantsUtil.NUMBER_60 * ConstantsUtil.NUMBER_1000);
        return day;
    }

    /**
     * <计算当月最后一天,返回字符串>
     * <功能详细描述>
     * @return str
     * @see [类、类#方法、类#成员]
     */
    public String getDefaultDay()
    {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);//设为当前月的1号
        lastDate.add(Calendar.MONTH, 1);//加一个月，变为下月的1号
        lastDate.add(Calendar.DATE, -1);//减去一天，变为当月最后一天

        str = sdf.format(lastDate.getTime());
        return str;
    }

    /**
     * <上月第一天>
     * <功能详细描述>
     * @return str str
     * @see [类、类#方法、类#成员]
     */
    public String getPreviousMonthFirst()
    {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);//设为当前月的1号
        lastDate.add(Calendar.MONTH, -1);//减一个月，变为下月的1号
        //lastDate.add(Calendar.DATE,-1);//减去一天，变为当月最后一天

        str = sdf.format(lastDate.getTime());
        return str;
    }

    /**
     * <获取当月第一天>
     * <功能详细描述>
     * @return str
     * @see [类、类#方法、类#成员]
     */
    public String getFirstDayOfMonth()
    {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.set(Calendar.DATE, 1);//设为当前月的1号
        str = sdf.format(lastDate.getTime());
        return str;
    }

    /**
     * <获得本周星期日的日期>
     * <功能详细描述>
     * @return preMonday
     * @see [类、类#方法、类#成员]
     */
    public String getCurrentWeekday()
    {
        weeks = 0;
        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + ConstantsUtil.NUMBER_06);
        Date monday = currentDate.getTime();

        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
    }

    /**
     * <获取当天时间>
     * <功能详细描述>
     * @param dateformat dateformat
     * @return hehe
     * @see [类、类#方法、类#成员]
     */
    public String getNowTime(String dateformat)
    {
        Date now = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat(dateformat);//可以方便地修改日期格式
        String hehe = dateFormat.format(now);
        return hehe;
    }

    // 获得当前日期与本周日相差的天数
    private int getMondayPlus()
    {
        Calendar cd = Calendar.getInstance();
        // 获得今天是一周的第几天，星期日是第一天，星期二是第二天......
        int dayOfWeek = cd.get(Calendar.DAY_OF_WEEK) - 1; //因为按中国礼拜一作为第一天所以这里减1
        if (dayOfWeek == 1)
        {
            return 0;
        }
        else
        {
            return 1 - dayOfWeek;
        }
    }

    /**
     * <获得本周一的日期>
     * <功能详细描述>
     * @return preMonday
     * @see [类、类#方法、类#成员]
     */
    public String getMondayOFWeek()
    {
        weeks = 0;
        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus);
        Date monday = currentDate.getTime();

        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
    }

    /**
     * <获得相应周的周六的日期>
     * <功能详细描述>
     * @return preMonday
     * @see [类、类#方法、类#成员]
     */
    public String getSaturday()
    {
        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + ConstantsUtil.NUMBER_07 * weeks + ConstantsUtil.NUMBER_06);
        Date monday = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
    }

    /**
     * <获得上周星期日的日期>
     * <功能详细描述>
     * @return preMonday
     * @see [类、类#方法、类#成员]
     */
    public String getPreviousWeekSunday()
    {
        weeks = 0;
        weeks--;
        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + weeks);
        Date monday = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
    }

    /**
     * <获得上周星期一的日期>
     * <功能详细描述>
     * @return preMonday
     * @see [类、类#方法、类#成员]
     */
    public String getPreviousWeekday()
    {
        weeks--;
        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + ConstantsUtil.NUMBER_07 * weeks);
        Date monday = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
    }

    /**
     * <获得下周星期一的日期>
     * <功能详细描述>
     * @return preMonday
     * @see [类、类#方法、类#成员]
     */
    public String getNextMonday()
    {
        weeks++;
        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + ConstantsUtil.NUMBER_07);
        Date monday = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
    }

    /**
     * <获得下周星期日的日期>
     * <功能详细描述>
     * @return preMonday
     * @see [类、类#方法、类#成员]
     */
    public String getNextSunday()
    {

        int mondayPlus = this.getMondayPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, mondayPlus + ConstantsUtil.NUMBER_07 + ConstantsUtil.NUMBER_06);
        Date monday = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preMonday = df.format(monday);
        return preMonday;
    }

    private int getMonthPlus()
    {
        Calendar cd = Calendar.getInstance();
        int monthOfNumber = cd.get(Calendar.DAY_OF_MONTH);
        cd.set(Calendar.DATE, 1);//把日期设置为当月第一天
        cd.roll(Calendar.DATE, -1);//日期回滚一天，也就是最后一天
        maxDate = cd.get(Calendar.DATE);
        if (monthOfNumber == 1)
        {
            return -maxDate;
        }
        else
        {
            return 1 - monthOfNumber;
        }
    }

    /**
     * <获得上月最后一天的日期>
     * <功能详细描述>
     * @return str
     * @see [类、类#方法、类#成员]
     */
    public String getPreviousMonthEnd()
    {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.MONTH, -1);//减一个月
        lastDate.set(Calendar.DATE, 1);//把日期设置为当月第一天
        lastDate.roll(Calendar.DATE, -1);//日期回滚一天，也就是本月最后一天
        str = sdf.format(lastDate.getTime());
        return str;
    }

    /**
     * <获得下个月第一天的日期>
     * <功能详细描述>
     * @return str
     * @see [类、类#方法、类#成员]
     */
    public String getNextMonthFirst()
    {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.MONTH, 1);//减一个月
        lastDate.set(Calendar.DATE, 1);//把日期设置为当月第一天
        str = sdf.format(lastDate.getTime());
        return str;
    }

    /**
     * <获得下个月最后一天的日期>
     * <功能详细描述>
     * @return str
     * @see [类、类#方法、类#成员]
     */
    public String getNextMonthEnd()
    {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.MONTH, 1);//加一个月
        lastDate.set(Calendar.DATE, 1);//把日期设置为当月第一天
        lastDate.roll(Calendar.DATE, -1);//日期回滚一天，也就是本月最后一天
        str = sdf.format(lastDate.getTime());
        return str;
    }

    /**
     * <获得明年最后一天的日期>
     * <功能详细描述>
     * @return str
     * @see [类、类#方法、类#成员]
     */
    public String getNextYearEnd()
    {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.YEAR, 1);//加一个年
        lastDate.set(Calendar.DAY_OF_YEAR, 1);
        lastDate.roll(Calendar.DAY_OF_YEAR, -1);
        str = sdf.format(lastDate.getTime());
        return str;
    }

    /**
     * <获得明年第一天的日期>
     * <功能详细描述>
     * @return str
     * @see [类、类#方法、类#成员]
     */
    public String getNextYearFirst()
    {
        String str = "";
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");

        Calendar lastDate = Calendar.getInstance();
        lastDate.add(Calendar.YEAR, 1);//加一个年
        lastDate.set(Calendar.DAY_OF_YEAR, 1);
        str = sdf.format(lastDate.getTime());
        return str;

    }

    //获得本年有多少天
    private int getMaxYear()
    {
        Calendar cd = Calendar.getInstance();
        cd.set(Calendar.DAY_OF_YEAR, 1);//把日期设为当年第一天
        cd.roll(Calendar.DAY_OF_YEAR, -1);//把日期回滚一天。
        int maxIntYear = cd.get(Calendar.DAY_OF_YEAR);
        return maxIntYear;
    }

    private int getYearPlus()
    {
        Calendar cd = Calendar.getInstance();
        int yearOfNumber = cd.get(Calendar.DAY_OF_YEAR);//获得当天是一年中的第几天
        cd.set(Calendar.DAY_OF_YEAR, 1);//把日期设为当年第一天
        cd.roll(Calendar.DAY_OF_YEAR, -1);//把日期回滚一天。
        int maxIntYear = cd.get(Calendar.DAY_OF_YEAR);
        if (yearOfNumber == 1)
        {
            return -maxIntYear;
        }
        else
        {
            return 1 - yearOfNumber;
        }
    }

    /**
     * <获得本年第一天的日期>
     * <功能详细描述>
     * @return preYearDay
     * @see [类、类#方法、类#成员]
     */
    public String getCurrentYearFirst()
    {
        int yearPlus = this.getYearPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, yearPlus);
        Date yearDay = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preYearDay = df.format(yearDay);
        return preYearDay;
    }

    /**
     * <获得本年最后一天的日期 *>
     * <功能详细描述>
     * @return years
     * @see [类、类#方法、类#成员]
     */
    public String getCurrentYearEnd()
    {
        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");//可以方便地修改日期格式
        String years = dateFormat.format(date);
        return years + "-12-31";
    }

    /**
     * <获得上年第一天的日期 *>
     * <功能详细描述>
     * @return years_value
     * @see [类、类#方法、类#成员]
     */
    public String getPreviousYearFirst()
    {
        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");//可以方便地修改日期格式
        String years = dateFormat.format(date);
        int yearsValue = Integer.parseInt(years);
        yearsValue--;
        return yearsValue + "-1-1";
    }

    /**
     * <获得上年最后一天的日期>
     * <功能详细描述>
     * @return preYearDay
     * @see [类、类#方法、类#成员]
     */
    public String getPreviousYearEnd()
    {
        weeks--;
        int yearPlus = this.getYearPlus();
        GregorianCalendar currentDate = new GregorianCalendar();
        currentDate.add(GregorianCalendar.DATE, yearPlus + maxYear * weeks + (maxYear - 1));
        Date yearDay = currentDate.getTime();
        DateFormat df = DateFormat.getDateInstance();
        String preYearDay = df.format(yearDay);
        getThisSeasonTime(ConstantsUtil.NUMBER_11);
        return preYearDay;
    }

    /**
     * <获得本季度>
     * <功能详细描述>
     * @param month month
     * @return seasonDate
     * @see [类、类#方法、类#成员]
     */
    public String getThisSeasonTime(int month)
    {
        int array[][] = { {1, 2, 3}, {4, 5, 6}, {7, 8, 9}, {10, 11, 12}};
        int season = 1;
        if (month >= ConstantsUtil.NUMBER_01 && month <= ConstantsUtil.NUMBER_03)
        {
            season = 1;
        }
        if (month >= ConstantsUtil.NUMBER_04 && month <= ConstantsUtil.NUMBER_06)
        {
            season = ConstantsUtil.NUMBER_02;
        }
        if (month >= ConstantsUtil.NUMBER_07 && month <= ConstantsUtil.NUMBER_09)
        {
            season = ConstantsUtil.NUMBER_03;
        }
        if (month >= ConstantsUtil.NUMBER_10 && month <= ConstantsUtil.NUMBER_12)
        {
            season = ConstantsUtil.NUMBER_04;
        }
        //此处checkstaly有问题。。
        int startMonth = array[season - 1][0];
        int endMonth = array[season - 1][ConstantsUtil.NUMBER_02];

        Date date = new Date();
        SimpleDateFormat dateFormat = new SimpleDateFormat("yyyy");//可以方便地修改日期格式
        String years = dateFormat.format(date);
        int yearsValue = Integer.parseInt(years);

        int startDays = 1;//years+"-"+String.valueOf(start_month)+"-1";//getLastDayOfMonth(years_value,start_month);
        int endDays = getLastDayOfMonth(yearsValue, endMonth);
        String seasonDate =
            yearsValue + "-" + startMonth + "-" + startDays + ";" + yearsValue + "-" + endMonth + "-" + endDays;
        return seasonDate;

    }

    /**
    * 获取某年某月的最后一天
    * @param year 年
    * @param month 月
    * @return 最后一天
    */
    private int getLastDayOfMonth(int year, int month)
    {
        if (month == ConstantsUtil.NUMBER_01 || month == ConstantsUtil.NUMBER_03
            || month == ConstantsUtil.NUMBER_05 || month == ConstantsUtil.NUMBER_07
            || month == ConstantsUtil.NUMBER_08 || month == ConstantsUtil.NUMBER_10
            || month == ConstantsUtil.NUMBER_12)
        {
            return ConstantsUtil.NUMBER_31;
        }
        if (month == ConstantsUtil.NUMBER_04 || month == ConstantsUtil.NUMBER_06
            || month == ConstantsUtil.NUMBER_09 || month == ConstantsUtil.NUMBER_11)
        {
            return ConstantsUtil.NUMBER_30;
        }
        if (month == ConstantsUtil.NUMBER_02)
        {
            if (isLeapYear(year))
            {
                return ConstantsUtil.NUMBER_29;
            }
            else
            {
                return ConstantsUtil.NUMBER_28;
            }
        }
        return 0;
    }

    /**
    * 是否闰年
    * @param year 年
    * @return year
    */
    public boolean isLeapYear(int year)
    {
        return (year % ConstantsUtil.NUMBER_04 == 0 && year % ConstantsUtil.NUMBER_100 != 0)
            || (year % ConstantsUtil.NUMBER_400 == 0);
    }
}
